SpareRadar OBD-II Code Lookup

P3003

Set by the manufacturer, so it means different things on different makes. 2 makes in the table below.

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What P3003 means, by make 2 makes
  • Audi Relay for small heating J359-Short circuit to positive 4C03 19459
  • Volkswagen Engine Coolant Heater Relay 1 Output Low

Each line is that manufacturer's own meaning for P3003. They are genuinely different faults, not rewordings of one, so a meaning listed against one make says nothing about the others. If your make is not listed, we do not hold it - your manufacturer's service information is the authority.

Code structure P3003
P
Powertrain
engine, transmission and emissions
3
Manufacturer-specific
Defined by the vehicle manufacturer, so the meaning varies between makes.
0
0
3
Fault index
identifies the specific fault
Powertrain Manufacturer-specific
Nearby codes in the P3 range
P3001 manufacturer-specific, 3 makes P3002 manufacturer-specific, 3 makes P3005 manufacturer-specific, 3 makes P3006 manufacturer-specific, 3 makes P3008 manufacturer-specific, 2 makes P300B manufacturer-specific, 2 makes P300C manufacturer-specific, 2 makes P300D manufacturer-specific, 2 makes

Manufacturer code meanings from kierandrewett/obd (b56a07a), used under the MIT licence. Copyright (c) Kieran Drewett. SpareRadar is not affiliated with the dataset's authors.